[jira] [Resolved] (STANBOL-1092) Improve UpdateHandler configuration of the SolrYard and enable commitWithin by default

["Rupert Westenthaler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STANBOL-1092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rupert Westenthaler resolved STANBOL-1092.
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    Resolution: Fixed

fixed with http://svn.apache.org/r1489857
                
> Improve UpdateHandler configuration of the SolrYard and enable commitWithin by default
> --------------------------------------------------------------------------------------
>
>                 Key: STANBOL-1092
>                 URL: https://issues.apache.org/jira/browse/STANBOL-1092
>             Project: Stanbol
>          Issue Type: Improvement
>          Components: Entityhub
>            Reporter: Rupert Westenthaler
>            Assignee: Rupert Westenthaler
>
> Right now the default configuration of the SolrYard is
> * commitWithin is deactivated - meaning that every change does trigger a commit
> * Auto commit is deactivated
> * Transaction Log is enabled
> * Soft Commit is deactivated
> This has several potential issues
> * The default configuration is very slow for updates - as it makes an hard commit on each call that changes the index (e.g. loading Entities to a ManagedSite)
> * If commitWithin is enabled there will be no hard commits, as commitWithin was changed to Soft-Commits with Solr 4.0. Because of the changes to the index are never persisted and the transaction log will grow forever.
> With this issue the default configuration will be changed like follows:
> * commitWithin will be enabled by default(change in the DEFAULT value for the configuration property). The (default) duration will be kept by 10sec (a fallback in case users remove the soft auto commit from the solrconf.xml)
>     * the Entityhub will still use immediate commits on every change (keep the old default). The default configuration of the Entityhub will need to be adapted accordingly.
> * (hard) auto commit will be set to 1min. This ensures that data are written to disc at least every minute and transaction logs will not grow indefinitely. 
> * soft auto commit will be set to 1sec. This means that an added/updated Entity will be available to seaches latest 1sec after adding it
> * transaction log will be activated, as this is required by the used solr.NRTCachingDirectoryFactory directoryFactory.

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